Latest: Directory:Building > Directory:Earth Bag Building Method (Interview) - The Cal-Earth bags enable you to build a home mostly from the dirt under your feet, mixed with ~10% concrete and 10% water, with a great deal of artistic freedom in wall shape using arch construction, eliminating the need for a separate roof. Makes home building far more affordable and renewable while giving you thermal mass to save on heating/cooling costs. (PESWiki Sept. 30, 2009) (Comment)